The price was great. The ones I ordered should transmit on 3.15 MHz. When I couldn't get them to relearn in my 2007 Chevy Colorado I went to the dealer and their diagnostic computer said the sensors 0n were sending 3.149MHz and the truck module needed 3.150MHz. I received a replacement set that doesn't match the frequency either. They were all brought back to Revane. I still have the TPMS light flashing on the dash and spent about $140 to install and realign. I don't recommend them.